基于单次频域互相关测量的全光周期码匹配
All-optical periodic code matching by a single-shot frequency-domain cross-correlation measurement
摘要：
介绍了周期序列间交叉关联函数的光学单短测量方法。该序列被编码成宽带超短相位整形脉冲，并与附加的振幅整形窄带脉冲在非线性介质中混频。测量所得到的四波混频信号的频谱以提供交叉关联函数。互相关和自相关（后者还包括序列周期的信息）的值之间的高对比度具有在CDMA通信协议的光学实现中采用的潜力。
英文摘要：
Optical single-short measurement of the cross-correlation function between periodic sequences is demonstrated. The sequences are encoded into the broadband ultrashort phase-shaped pulses which are mixed in the nonlinear medium with additional amplitude-shaped narrowband pulse. The spectrum of the resulted four wave mixing signal is measured to provide the cross-correlation function. The high contrast between the values of cross-correlation and auto-correlation (the latter includes also the information of the sequence period) has potential to be employed in the optical implementation of CDMA communication protocol.
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